when sending eMarketing campaings it es easy to create an response link, which i.e. adds a person to an selection.
What we want to do is that the customers enters data to a field and that this data ist saved in a userdefined field.
This could be used i.e. for invitations where we ask for the amount of persons which will participate.
Creating several links, for each reasonable number of persons is not an option.
Any hints are welcome.